Centrifugal pump.



PATENTED JUNE 9, 1903.

A.G.E.B.ATBAU. GENTRIPUGAL PUMP.

APPLICATION FILED NOV. 11, 1902.

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No. 730,842. PATENTED JUNE 9, 190a.

A. c. B. RATEAU. GENTRIFUGAL PUMP.

' APPLICATION FILED NOV. 11, 1902.

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PATENTED JUNE 9, 1903.

A. G. B. RATEAU.

OENTRIFUGAL PUMP. APPLIO'ATION rum) NOV.11, 1902.

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mummm NITED STATES Patented June 9, 1903.

PATENT OFFICE.

CENTRIFUGAL PUMP.

SPECIFICATION forming part of Letters IatentNo. 730,842, dated June 9,1903.

Original application filed October 7, 1901, Serial No. 77,825. Dividedand this application filed November 11, 1902. Serial v No. 130,841. (Nomodel.)

To all whom it may concern.-

Be it known that LIAUGUSTE CAMILLE,

EDMOND RATEAU, a citizen of the Republic of France, residing at Paris,France, have invented certain new and useful Improvements in CentrifugalPumps, of-which the following is a specification.

My invention has relation to a centrifugal turbine-pump, and in suchconnection it relates to the construction and arrangement of such apump.

In an application for patent filed by me on October 7, 1901, under theSerial No. 77,825, and of which application the present application is adivision, there is described a centrifugal pump in which a series ofturbines are arranged side by side upon a common shaft in order that theliquid or fluid may be pumped to a great height. In the formerapplication means for preventing churning of the fluid or liquid in thepassages of the pump are described, as well as means for taking up andrelieving the longitudinal thrust upon the shaft.

In my present application a pump of the same general type forms thebasis for the improvements herein claimed.

The object of my present invention is, how ever, to provide a pumpwherein without altering the speed the liquid or fluid may be raised todifferent heights.

In carrying out my invention there is provided a main shaft, upon whichone or a series of turbines is or are secured, and in addition thereto asleeve or hollow shaft surrounding the main shaft, and to which sleeveanother turbine or other series of turbines is or are secured. There isalso provided a valve-controlled discharge for each series of turbinesand a means whereby the main shaft and sleeve may be coupled to permitboth sets or series of turbines to codperate in forcing the fluidthrough one discharge to a great height or uncoupled to permit'but oneset or series of turbines to force the fluid through the other dischargeto a lesser height.

The nature and scope of my invention will be more fully understood fromthe following description, taken in connection with the accompanyingdrawings, forming part hereof, in which- Figure 1 is a verticalsectional view of a pump embodying main features of my invention in itssimplest form. Fig. 2 is a top or plan view thereof. Fig. 3 is ahorizontal sectional view, enlarged, of the preferred form of. couplingor uncoupling the two shafts carrying the turbines; and Fig. 4 is atransverse sectional vie-wof Fig. 3.

Referring to the drawings, the pump is illustrated in its simplest formhaving but two turbines 1 and 31. It will of course be understood thatthese two turbines may be replaced by two series of correspondingturbines arranged and coacting in the manner hereinafter set forthwithout departing'froin the spirit of my invention. The turbine 1, whichis next adjacent to the circular chamber 8 of the inlet 7 for the fluid,is keyed or otherwise secured directly to the main shaft 2, which ispreferably solid. The other turbine 31 is secured to a sleeve or hollowspindle 32, loosely surrounding the shaft 2. The turbine 1 is providedwith a volute 33 or discharge-chamber entering a delivery-pipe 35,controlled by the cook or valve 37. The other turbine 31 is alsoprovided with a separate volute 34, entering a second deliverypipe 36,controlled by a cook or valve 38. Referring now to Figs. 3 and 4, uponthe end of the shaft 2 is secured a head 40, on which slides acoupling-collar41. The collar 41 has on its inner periphery guide orchannel ways, into which extend the keys or splines 48, carried by thehead 40, so that while the clutch -or coupling collar 41 turns with thehead 40 and shaft 2 it may be slid back and forth upon the head 40, asdesired. On the external periphery of the collar 41 is formed an annulargroove into which fits an eccentric or cam 42, carried at the end of thecrankshaft 47, operated by a weighted arm or handle 43. When theweighted arm 43 is raised at right angles to the position shown in Figs.3 and 4, the shaft 47- turns the eccentric 42, which, moving in thegroove of the couplingcollar 41, slides that collar inward. A reversemovement of the weighted arm 43 slides the collar 41 outward. The innerface of the coupling-collar 41 is provided with a series of teeth 44,adapted when the collar 41 is slid inward to engage the teeth 45,projecting from the outer end of a sleeve 46, forming an extension onthe hollow spindle 32. When the teeth of the collar 41 are in engagementwith the teeth of the sleeve 46, the shaft 2 transmits its movement tothe hollow spindle 32, and both turbines 1 and 31 turn together. When,however, the collar 41 is disengaged from the sleeve 46, the shaft 2 andits turbine 1 continue to turn; but the turbine 31 and spindle 32 remaininoperative. In the operation of the pump when the fluid is to be liftedto its greatest height the valve 37 of the discharge-pipe 35 is closed,and the valve 38 of the pipe 36 is opened. The hollow spindle 32 andmain shaft 2 are coupled, and the fluid is forced through both rotatingturbines 1 and 31 and delivered through the volute 34 into the pipe 36.When, however, the fluid is to be lifted to the lesser height, the valve38 of the pipe 36 is closed and the valve 37 of the pipe 35 is opened.The hollow spindle 32 and its turbine 31 are uncoupled from the shaft 2,and the fluid is forced by the first turbine 1 directly into the pipe 35through the volute 33 and the fluid does not traverse the second turbine31. It

- is obvious that the turbine 1 may be replaced by a series of turbinesarranged side by sideupon the common shaft 2 and that a seriesofturbines 31 may be arranged on the hollow spindle 32 instead of a singleturbine and thusincreased pressure he obtained. In such an instance thefluid traverses first the series of turbines 1 before it enters thefirst in series of turbines 31, and the operation is the same ashereinbefore described. It will also be understood that the diameters ofthe turbines 1 and 31 may, if desired, be either coequal, as illustratedin the drawings, or may vary in extent to obtain varying pressures.

Each turbine 1 or 31 may have the means for preventing churning, asdescribed in my former application, Serial No. 77,825, and thelongitudinal thrust on the main shaft may be relieved, as described insaid former application, by making the coupling-sleeve 46 thepressure-equalizing piston.

Having thus described the nature and object of my invention, what Iclaim as new, and desire to secure by Letters Patent, is-

1. In a centrifugal pump, a main shaft, a series of one or more turbinescarried by said main shaft, an inlet leading to said turbines and adischarge therefrom, in combination 'with a hollow spindle surroundingthe main shaft, a second series of one or more turbines carried by thehollow spindle and arranged to receive the liquid discharged from thefirst series of turbines, a second discharge leading from the secondseries of turbines, means for controlling both discharges, and means forcoupling and uncoupling the hollow spindle and main shaft.

2. In a centrifugal pump, a main shaft, a turbine carried by said mainshaft, a fluid inlet leading to said turbine, a volute or dis chargechamber leading from said turbine, a hollow spindle surrounding the mainshaft, a second turbine carried by said spindle and communicating on itsinlet side with the V0 lute of the first turbine, a second volute intowhich the second turbine discharges, a coupling mechanism arranged toconnect or disconnect the spindle and main shaft, a discharge-pipeleading from the first volute, a valve controlling said pipe, a seconddischarge-pipe leading from the second volute, and a valve controllingsaid second pipe.

' In testimony whereof I have hereunto set my signature in the presenceof two subscribing witnesses.

AUGUSIE OAMILLE EDMOND RATEAU.

Witnesses:

G. DE MESTIEL, AUGUSTUS E. INGRAM.

